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Table 1 Annual trips: number and kilometers, by age and yeara

From: The association between graduated driver licensing laws and travel behaviors among adolescents: an analysis of US National Household Travel Surveys

Person type

Age (yr)

Year

Average number of annual trips (95 % CI)

Average annual kilometers (95 % CI)

Driver of passenger vehicle

16

1995-1996

521 (444 – 598)

4,588 (3,814 – 5,364)

  

2001-2002

518 (450 – 586)

5,208 (4,297 – 6,117)

  

2008-2009

321 (268 – 375)

2,729 (2,115 – 3,343)

 

17

1995-1996

897 (802 – 993)

9,685 (7,326 – 12,046)

  

2001-2002

771 (695 – 848)

9,065 (7,047 – 11,082)

  

2008-2009

624 (560 – 688)

6,025 (5,189 – 6,862)

 

20-24

1995-1996

1,152 (1,104 – 1,201)

17,263 (16,032 – 18,493)

  

2001-2002

1,038 (1,001 – 1,075)

17,424 (16,245 – 18,602)

  

2008-2009

943 (899 – 987)

14,841 (13,770 – 15,913)

Passenger in passenger vehicle

16

1995-1996

779 (692 – 867)

10,564 (7,747 – 13,378)

 

2001-2002

720 (649 – 790)

8,913 (7,733 – 10,092)

 

2008-2009

560 (509 – 611)

9,384 (7,678 – 11,090)

 

17

1995-1996

715 (641 – 788)

10,372 (7,269 – 13,475)

  

2001-2002

580 (507 – 652)

8,779 (7,131 – 10,429)

  

2008-2009

357 (313 – 400)

7,792 (5,615 – 9,971)

 

20-24

1995-1996

361 (328 – 394)

7,269 (6,090 – 8,449)

  

2001-2002

332 (306 – 357)

6,869 (5,860 – 7,879)

  

2008-2009

199 (177 – 220)

3,697 (3,045 – 4,350)

Bus rider

16

1995-1996

117 (93 – 141)

1,421 (995 – 1,846)

 

2001-2002

122 (99 – 146)

1,798 (1,136 – 2,457)

  

2008-2009

114 (95 – 134)

1,831 (1,308 – 2,354)

 

17

1995-1996

63 (47 – 78)

1,054 (665 – 1,444)

  

2001-2002

76 (57 – 95)

1,231 (911 – 1,551)

  

2008-2009

130 (105 – 155)

2,412 (1,622 – 3,204)

 

20-24

1995-1996

29 (22 – 35)

431 (275 – 586)

  

2001-2002

32 (25 – 39)

475 (280 – 669)

  

2008-2009

32 (23 – 41)

462 (277 – 647)

Bicyclist

16

1995-1996

19 (9 – 29)

55 (14 – 95)

  

2001-2002

12 (5 – 18)

37 (3 – 71)

  

2008-2009

13 (9 – 18)

31 (19 – 43)

 

17

1995-1996

14 (5 – 23)

18 (5 – 32)

  

2001-2002

14 (4 – 24)

47 (8 – 84)

  

2008-2009

9 (5 – 12)

24 (10 – 37)

 

20-24

1995-1996

16 (9 – 23)

61 (11 – 111)

  

2001-2002

6 (4 – 9)

16 (8 – 24)

  

2008-2009

14 (8 – 21)

92 (40 – 142)

Pedestrian

16

1995-1996

145 (108 – 181)

164 (97 – 232)

  

2001-2002

157 (128 – 185)

161 (129 – 192)

  

2008-2009

196 (155 – 236)

246 (156 – 336)

 

17

1995-1996

108 (82 – 134)

92 (64 – 117)

  

2001-2002

127 (91 – 162)

177 (116 – 237)

  

2008-2009

150 (114 – 186)

164 (126 – 204)

 

20-24

1995-1996

99 (85 – 113)

80 (68 – 95)

  

2001-2002

137 (121 – 153)

145 (122 – 169)

  

2008-2009

124 (107 – 141)

140 (114 – 164)

  1. Abbreviation: CI confidence interval
  2. a Data from the National Household Travel Survey